1990 Dodge RAM 350 Gas Tank Size & Fuel Capacity
Fuel tank capacity
22.0gal · 83 L
The 1990 Dodge RAM 350 has a fuel tank capacity of 22.0 gallons (83 liters) on every trim.
22.0 gal · Bigger than 78% of 1990 models we list.
1990 Dodge RAM 350 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
All 6 trims
| Trim | Engine | Drive | Tank | |||
|---|---|---|---|---|---|---|
| 2dr Regular Cab 4WD LB 5.9L 8cyl 4M · 4WD | 5.9L 8cyl 4M | 4WD | 22.0 gal83 L | |||
| 2dr Regular Cab LB 5.9L 8cyl 4M · RWD | 5.9L 8cyl 4M | RWD | 22.0 gal83 L | |||
| LE 2dr Regular Cab 4WD LB 5.9L 8cyl 4M · 4WD | 5.9L 8cyl 4M | 4WD | 22.0 gal83 L | |||
| LE 2dr Regular Cab LB 5.9L 8cyl 4M · RWD | 5.9L 8cyl 4M | RWD | 22.0 gal83 L | |||
| SE 2dr Regular Cab 4WD LB 5.9L 8cyl 4M · 4WD | 5.9L 8cyl 4M | 4WD | 22.0 gal83 L | |||
| SE 2dr Regular Cab LB 5.9L 8cyl 4M · RWD | 5.9L 8cyl 4M | RWD | 22.0 gal83 L | |||
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. The EPA doesn't rate fuel economy for heavy-duty pickups and vans (over 8,500 lb gross vehicle weight), so these trims have no official MPG or range.
What it costs to fill up a 1990 Dodge RAM 350
$93.94 to fill the 22.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 22.0 gal | Regular | $4.27 | $93.94 | $70.45 |
By region, 22.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $88.44 |
| Midwest | $4.27 | $93.94 |
| Gulf CoastLowest | $3.70 | $81.40 |
| Rocky Mountain | $4.46 | $98.12 |
| West Coast | $5.42 | $119.24 |
| CaliforniaHighest | $5.89 | $129.58 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 22.0-gallon tank$93.94
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
RAM 350 tank size in other years
1990 is the first RAM 350 model year we list.
| Model year | Tank | Longest highway range |
|---|---|---|
| 1993 RAM 350 | 22.0–30.0 gal | Not rated |
| 1992 RAM 350 | 22.0–30.0 gal | Not rated |
| 1991 RAM 350 | 22.0 gal | Not rated |
| 1990 RAM 350 | 22.0 gal | Not rated |
Frequently asked questions
What is the fuel tank capacity of the 1990 Dodge RAM 350?
The 1990 Dodge RAM 350 holds 22.0 gallons (83 liters) on every trim we list.
How many gallons and liters does the 1990 Dodge RAM 350 gas tank hold?
The 1990 Dodge RAM 350 tank holds 83 liters, or 22.0 gallons in US gallons.
Does 4WD change the 1990 Dodge RAM 350 gas tank?
No. 4WD and RWD versions of the 1990 Dodge RAM 350 use the same 22.0 gal tank.
What gas does the 1990 Dodge RAM 350 take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 1990 Dodge RAM 350?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 22.0-gallon tank from empty costs $93.94. It ranges from $81.40 in the Gulf Coast to $129.58 in California.
How much does a full tank of gas weigh in a 1990 Dodge RAM 350?
About 136 pounds for the 22.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings. Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.